System for reducing lead-in time in a laser disk reproducing app

Details System for reducing lead-in time in a laser disk reproducing app System for reducing lead-in time in a laser disk reproducing app

1993-07-14

1996-10-01

Epps, Georgia Y.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369 58, G11B 700

Patent

active

055616518

ABSTRACT:
A lead-in time reduction system determines if a disk is loaded at the time of turning on an initial focus-on function in a laser disk reproducing apparatus. If it is determined that the disk has been loaded, a pick-up is moved directly to a limit switch-on point using a feed motor only. The lead-in time reduction system includes determining if the disk is loaded by checking whether data is picked-up through the pick-up after the pick-up is located on a focus on point, if it is determined that the disk is loaded in the determining step, controlling the feed motor to move the pick-up directly to a limit switch-on point of the laser disk, and if the limit switch is turned on in the controlling step, reproducing a desired program by using picked-up information after picking up a lead-in region of the laser disk. Thus, the lead-in time which is completed before searching the location of the substantial program to be reproduced after the power is turned on, can be reduced as compared with the conventional technology.

REFERENCES:
patent: 4656617 (1987-04-01), Nakatsuyama et al.
patent: 5172354 (1992-12-01), Otsubo

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